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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
It's a pity there is no verification option for Java.
The series of tasks seemed interesting.
Those who study need these comments.
These kata are exactly what those who have started learning solve.